Given the data, can we strongly suggest that marijuana, especially in the high-potency forms and fast delivery systems available, is now a serious risk factor in violent acts?  

All the facts and increasing potency of THC in marijuana is a RED ALERT to parents. We inform parents of the warning signs of marijuana use, so they have every opportunity to steer youth away from irreversible harm.

Homeland Security 2018 report

About half of the attackers (n = 15, 54%) had a history of illicit drug use and/or substance abuse. This abuse, which included alcohol and marijuana, was evidenced by such factors as the attacker receiving treatment for the abuse, suffering legal consequences, or having significant problems in their personal lives stemming from the abuse.”

Marijuana use is associated with intimate partner violence perpetration among men arrested for domestic violence

In summary, findings demonstrated marijuana use positively associated with psychological, physical, and sexual IPV perpetration among men arrested for domestic violence and court-referred to BIPs. These findings were present even after accounting for other known risk factors for IPV perpetration. We believe continued investigation into the associations between marijuana use and IPV is important due to the public health, legal policy, and treatment implications that would result from this line of research. Continued research utilizing rigorous methodological designs, such as daily diary designs, is needed to further understand the association between marijuana and IPV perpetration. Finally, pending replication and extension, findings suggest BIPs may want to target reductions in marijuana use, which may have the concurrent benefit of reducing IPV.

A Review of Cases of Marijuana and Violence

“Here, we present 14 cases of violence with chronic marijuana users that highlight recurring consequences of: marijuana induced paranoia (exaggerated, unfounded distrust) and marijuana induced psychosis (radical personality change, loss of contact with reality).”